home-assistant.io/source/_integrations/light.template.markdown

title, description, ha_category, ha_release, ha_iot_class, ha_quality_scale, ha_domain

title	description	ha_category	ha_release	ha_iot_class	ha_quality_scale	ha_domain
Template Light	Instructions on how to integrate Template Lights into Home Assistant.	Light	0.46	Local Push	internal	template

The template platform creates lights that combine integrations and provides the ability to run scripts or invoke services for each of the on, off, and brightness commands of a light.

To enable Template Lights in your installation, add the following to your configuration.yaml file:

{% raw %}

# Example configuration.yaml entry
light:
  - platform: template
    lights:
      theater_lights:
        friendly_name: "Theater Lights"
        level_template: "{{ state_attr('sensor.theater_brightness', 'lux')|int }}"
        value_template: "{{ state_attr('sensor.theater_brightness', 'lux')|int > 0 }}"
        temperature_template: "{{states('input_number.temperature_input') | int}}"
        color_template: "({{states('input_number.h_input') | int}}, {{states('input_number.s_input') | int}})"
        turn_on:
          service: script.theater_lights_on
        turn_off:
          service: script.theater_lights_off
        set_level:
          service: script.theater_lights_level
          data_template:
            brightness: "{{ brightness }}"
        set_temperature:
          service: input_number.set_value
          data_template:
            value: "{{ color_temp }}"
            entity_id: input_number.temperature_input
        set_white_value:
          service: input_number.set_value
          data_template:
            value: "{{ white_value }}"
            entity_id: input_number.white_value_input
        set_color:
          - service: input_number.set_value
            data_template:
              value: "{{ h }}"
              entity_id: input_number.h_input
          - service: input_number.set_value
            data_template:
              value: "{{ s }}"
              entity_id: input_number.s_input

{% endraw %}

{% configuration %} lights: description: List of your lights. required: true type: map keys: friendly_name: description: Name to use in the frontend. required: false type: string entity_id: description: A list of entity IDs so the light only reacts to state changes of these entities. This can be used if the automatic analysis fails to find all relevant entities. required: false type: [string, list] unique_id: description: An ID that uniquely identifies this light. Set this to an unique value to allow customisation trough the UI. required: false type: string value_template: description: Defines a template to get the state of the light. required: false type: template default: optimistic level_template: description: Defines a template to get the brightness of the light. required: false type: template default: optimistic temperature_template: description: Defines a template to get the color temperature of the light. required: false type: template default: optimistic white_value_template: description: Defines a template to get the white value of the light. required: false type: template default: optimistic color_template: description: Defines a template to get the color of the light. Must render a tuple (hue, saturation) required: false type: template default: optimistic icon_template: description: Defines a template for an icon or picture, e.g., showing a different icon for different states. required: false type: template availability_template: description: Defines a template to get the available state of the component. If the template returns true, the device is available. If the template returns any other value, the device will be unavailable. If availability_template is not configured, the component will always be available. required: false type: template default: true turn_on: description: Defines an action to run when the light is turned on. required: true type: action turn_off: description: Defines an action to run when the light is turned off. required: true type: action set_level: description: Defines an action to run when the light is given a brightness command. required: false type: action set_temperature: description: Defines an action to run when the light is given a color temperature command. required: false type: action set_white_value: description: Defines an action to run when the light is given a white value command. required: false type: action set_color: description: Defines an action to run when the light is given a color command. required: false type: action {% endconfiguration %}

Considerations

If you are using the state of a platform that takes extra time to load, the Template Light may get an unknown state during startup. This results in error messages in your log file until that platform has completed loading. If you use is_state() function in your template, you can avoid this situation. For example, you would replace {% raw %}{{ states.switch.source.state == 'on' }}{% endraw %} with this equivalent that returns true/false and never gives an unknown result: {% raw %}{{ is_state('switch.source', 'on') }}{% endraw %}

Examples

In this section you will find some real-life examples of how to use this light.

Theater Volume Control

This example shows a light that is actually a home theater's volume. This component gives you the flexibility to provide whatever you'd like to send as the payload to the consumer including any scale conversions you may need to make; the Media Player component needs a floating point percentage value from 0.0 to 1.0.

{% raw %}

light:
  - platform: template
    lights:
      theater_volume:
        friendly_name: "Receiver Volume"
        value_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {% if state_attr('media_player.receiver', 'is_volume_muted') %}
              off
            {% else %}
              on
            {% endif %}
          {% else %}
            off
          {% endif %}
        turn_on:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: false
        turn_off:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: true
        set_level:
          service: media_player.volume_set
          data_template:
            entity_id: media_player.receiver
            volume_level: "{{ (brightness / 255 * 100)|int / 100 }}"
        level_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {{ (state_attr('media_player.receiver', 'volume_level')|float * 255)|int }}
          {% else %}
            0
          {% endif %}

{% endraw %}

Change The Icon

This example shows how to change the icon based on the light state.

{% raw %}

light:
  - platform: template
    lights:
      theater_volume:
        friendly_name: "Receiver Volume"
        value_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {% if state_attr('media_player.receiver', 'is_volume_muted') %}
              off
            {% else %}
              on
            {% endif %}
          {% else %}
            off
          {% endif %}
        icon_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {% if state_attr('media_player.receiver', 'is_volume_muted') %}
              mdi:lightbulb-off
            {% else %}
              mdi:lightbulb-on
            {% endif %}
          {% else %}
            mdi:lightbulb-off
          {% endif %}
        turn_on:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: false
        turn_off:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: true

{% endraw %}

Change The Entity Picture

This example shows how to change the entity picture based on the light state.

{% raw %}

light:
  - platform: template
    lights:
      theater_volume:
        friendly_name: "Receiver Volume"
        value_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {% if state_attr('media_player.receiver', 'is_volume_muted') %}
              off
            {% else %}
              on
            {% endif %}
          {% else %}
            off
          {% endif %}
        icon_template: >-
          {% if is_state('media_player.receiver', 'on') %}
            {% if state_attr('media_player.receiver', 'is_volume_muted') %}
              /local/lightbulb-off.png
            {% else %}
              /local/lightbulb-on.png
            {% endif %}
          {% else %}
            /local/lightbulb-off.png
          {% endif %}
        turn_on:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: false
        turn_off:
          service: media_player.volume_mute
          data:
            entity_id: media_player.receiver
            is_volume_muted: true

{% endraw %}